Malicious PDF — malware analysis report

Static analysis result for SHA-256 120c0af4788ed443…

MALICIOUS

PDF

110.6 KB Created: 2021-06-24 07:57:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: 8c9860ac060e9f488181e130a374d2ac SHA-1: 2161fd716d02a8de31d2fc2e7d71083d37575b2a SHA-256: 120c0af4788ed443babe59e22a03d56416dacfd480c06f1c9fd71e6b7aef5278
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The sample is a PDF file that contains numerous embedded URLs pointing to compromised websites, many of which are associated with WordPress upload vulnerabilities. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. The presence of a 'callback lure' heuristic suggests a potential scam or phishing attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9704

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://wastran.ru/uplcv?utm_term=avyakt+murli+pdf+download PDF link annotation
    • https://holzhaus-suedtirol.it/wp-content/plugins/formcraft/file-upload/server/content/files/160adcbc06082e---23708739421.pdfIn PDF document text
    • https://www.hed-endo.hr/wp-content/plugins/formcraft/file-upload/server/content/files/1606c66478f148---56644506811.pdfIn PDF document text
    • http://www.verneteco.com/ckfinder/userfiles/files/torewopavovonos.pdfIn PDF document text
    • https://rjiminfra.com/wp-content/plugins/super-forms/uploads/php/files/40dfffbd10b642cd083f9d26090a1dac/29157110007.pdfIn PDF document text
    • https://completecollegestrategies.com/wp-content/plugins/super-forms/uploads/php/files/84249a3c529d42fe6ae5110ed4ae608f/25722853141.pdfIn PDF document text
    • https://motionslam.com/wp-content/plugins/super-forms/uploads/php/files/07d6163e07df97b73fc60cc9c8adcf85/bitoxavewofunozugusuw.pdfIn PDF document text
    • https://travolution.travel/wp-content/plugins/super-forms/uploads/php/files/e9ee5047bfb34e6e6e4190d486fb33d0/15197224740.pdfIn PDF document text
    • http://penoplex24.ru/wp-content/plugins/formcraft/file-upload/server/content/files/16098ea484310d---87478763654.pdfIn PDF document text
    • http://www.uvhk.com/wp-content/plugins/formcraft/file-upload/server/content/files/16098b4679cec2---fupusoxodov.pdfIn PDF document text
    • https://hometeamcorp.com/images/usr/jonolanodo.pdfIn PDF document text
    • https://bursaceviritercume.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607ffdb5dacab---tixutikobapapaj.pdfIn PDF document text
    • http://www.fonfe.com/uploads/files/98159700481.pdfIn PDF document text
    • https://www.colegiodesafio.net/home/wp-content/plugins/formcraft/file-upload/server/content/files/160b788cdb846f---gokowas.pdfIn PDF document text
    • https://www.taxikladis.gr/wp-content/plugins/formcraft/file-upload/server/content/files/1609b444b066a4---lidoxubodesaxolazolivowok.pdfIn PDF document text
    • http://www.reroofingbrisbaneqld.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160706ce5ddd35---fivulitejikukumirodupe.pdfIn PDF document text
    • https://caribemed.com/userfiles/file/28663207367.pdfIn PDF document text
    • https://www.nobleorthodontic.com/wp-content/plugins/super-forms/uploads/php/files/494f0f6ff580117eb89931ff4c7299db/83374760034.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fedorahosted.org/lohitIn PDF document text
    • http://smc.org.in)MeeraRegularMeera2016SMC7.0.0+20171102HussainIn PDF document text
    • http://smc.org.inhttp://smc.org.inIn PDF document text
    • http://www.indictrans.orgIn PDF document text
    • http://www.opentle.orgIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text
    • http://www.geocities.com/mitra_anirban/hobbies.htmGNUIn PDF document text
    • http://www.gnu.org/copyleft/gpl.htmRegularIn PDF document text
    • https://gitlab.com/smc/meera/blob/master/COPYINGIn PDF document text
    • http://sinhala.sourceforge.net/In PDF document text
    • http://sinhala.cvs.sourceforge.net/viewvc/*checkout*/sinhala/sinhala/fonts/CREDITSIn PDF document text
    • http://www.gnu.org/licenses/gpl-2.0.htmlIn PDF document text
    • http://www.gnu.org/licenses/gpl.htmlIn PDF document text

Extracted artifacts 15

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000bf6a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBF6A 3288 bytes
SHA-256: 6ab46f12474e68139f673941b37e9ef79510a81aedee0b72b2ed9b9adda6591a
font_01_sfnt_off0000cb2d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCB2D 5080 bytes
SHA-256: 013e36c0881dea07e5bc5631ffb67bf9552cff37623ba8ae0d2dcc82b89f138b
font_02_sfnt_off0000dc69.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC69 5116 bytes
SHA-256: bc5e67fb7ee9e8ac21092da122f591077163af530e224687ae9fa88644055565
font_03_sfnt_off0000ed8c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED8C 4944 bytes
SHA-256: 1e9c0b3d34503cc7681e2109c995b93e80c315ded8ea2be2e9e489a20fd89b84
font_04_sfnt_off0000fd9b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD9B 3048 bytes
SHA-256: 2f58f42410b60611991c12283e964e03297a95500ca09b14f4d605296bc50bc4
font_05_sfnt_off000109aa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x109AA 2328 bytes
SHA-256: 864cbe2c6973b44d2b71e19ffbffb2328dcb3759b07ceb43c11d5a372fc4956d
font_06_sfnt_off00011462.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11462 2604 bytes
SHA-256: 0e4b190990c22158f359a0de2485c61736e93a484cfb226f63bccb9bc1da1b2f
font_07_sfnt_off00011f3a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11F3A 3840 bytes
SHA-256: 5b8e8035f8940535bfb5f3d78de7d5c45dbc51c905faa5d9788b8fc152e96872
font_08_sfnt_off00012d4c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12D4C 2108 bytes
SHA-256: d117309382da938f7dffedc42f90dd4217b4d540d75629b80669d975ecbc171e
font_09_sfnt_off0001372a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1372A 4336 bytes
SHA-256: 87016e8933cc862d1d188edfbee698abcff8178ed3d6b510b61737ee02f60284
font_10_sfnt_off000144ca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x144CA 6640 bytes
SHA-256: 538512be6c526ea957b587fa229624d829dca4873b622d187784a60d2c877fcd
font_11_sfnt_off00015672.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15672 12300 bytes
SHA-256: 8056cfb7f4e1132326da7c20d7e28daf83398935e4517efc414bf4ee36544830
font_12_sfnt_off00017e5f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17E5F 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34
font_13_sfnt_off00018c6a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18C6A 3536 bytes
SHA-256: 7260850907c932567cbfd34933d3cabda316f162d2897651222b22ae0a4cbd12
font_14_sfnt_off00019a48.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x19A48 2608 bytes
SHA-256: ebc5699c0f42178fc20e76d84ea33a80238507828986975a956b1d0747304360

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